ORA-12008: error in materialized view refresh path

I got ” ORA-12008: error in materialized view refresh path ” error in Oracle database.

ORA-12008: error in materialized view refresh path

Details of error are as follows.

ORA-12008: error in materialized view refresh path
ORA-01555: snapshot too old: rollback segment number with name "" too small
ORA-22924: snapshot too old
ORA-06512: at "SYS.DBMS_REDEFINITION", line 52
ORA-06512: at "SYS.DBMS_REDEFINITION", line 1646

ORA-12008: error in materialized view refresh path

Cause: Table SNAP$_ reads rows from the view MVIEW$_, which is a view on the master 
table (the master may be at a remote site). Any error in this path will cause this error 
at refresh time. For fast refreshes, the table .MLOG$_ is also referenced.

Action: Examine the other messages on the stack to find the problem. See if the objects 
SNAP$_, MVIEW$_, .@, .MLOG$_@ still exist.

error in materialized view refresh path

This ORA-12008 errors are related with the Table SNAP$_ reads rows from the view MVIEW$_, which is a view on the master table (the master may be at a remote site). Any error in this path will cause this error at refresh time. For fast refreshes, the table .MLOG$_ is also referenced.

You should Examine the other messages on the stack to find the problem. See if the objects SNAP$_,MVIEW$_, .@, .MLOG$_@ still exist.

To solve this error, alter your session setting as follows.

alter session set nls_territory='';

Or If your Mview is using the INDEX, then rebuild that index as follows. Then refresh mview again.

SQL> ALTER INDEX SCHEMA.INDEX_NAME rebuild online;
Altered index.

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